One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,10,14)(7,12,9,11)(8,16,17,19)(13,18,20,15)(21,22,27,30)(23,28,32,36)(24,33,31,35)(25,29,26,34)(1,2)(3,4)(6,11)(7,9)(8,17)(12,14)(13,19)(16,20)(21,23)(22,28)(24,25)(26,31)(27,32)(29,33)(30,36)(34,35) involution — undirected(2,4)(5,7,10,9)(6,12,14,11)(8,15,17,18)(13,19,20,16)(21,24)(22,28)(23,25)(26,32)(27,31)(29,35)(30,36)(33,34)(5,8,10,17)(6,13,14,20)(7,15,9,18)(11,16,12,19)(21,25,27,26)(22,29,30,34)(23,31,32,24)(28,35,36,33)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.